The initial Royal Oak designs were fitted Together with the calibre 2121 movement, which was according to the calibre 2120 designed by Audemars Piguet in 1967, the whole world’s thinnest self-winding motion from the period with date indication, and an Over-all top of 3.05mm. The calibre 2121 was also equipped https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/